Electric-cable-winding mechanism



Dec. 11, 1923. 1,476,941

w. A. YOUNG ET AL ELECTRIC CABLE WINDING MECHANISM Filed Jan. 15, 1925 3Sheets-Sheet 1 INVENTORJ'.

MWAWWWQW A TTORNEYS.

BY M

Dec. 11, 1923.

W. A. YOUNG ET AL ELECTRIC CABLE WINDING MECHANISM Filed Jan. 15. 1923 3Sheets-Sheet 3 I QIILV QNTORS www WW ATTORNEYS Patented Dec. 11, 1923.

UNITED STATES 1,476,941 PATENT oFFlc WILLIAM A. YOUNG AND FRANK BRILL,OF MILWAUKEE, WISCONSIN, ASSIGNORS TO PAWLING AND HARNISCI-IFEGERCOMPANY, OF WEST MILWAUKEE, WISCONSIN, A

CORPORATION OF WISCONSIN.

ELECTRIC-CABLE-WINDING MECHANISM.

Application filed January 15, 1923. Serial No. 612,672.

To all whom, it may concern Be it known that we, WILLIAM A. YOUNG andFRANK BRILL, citizens of the United States, residing at Milwaukee, inthe county 5 of Milwaukee and State of Wisconsin, have invented certainnew and useful Improvements in Electric-Cable-Winding Mechanism, ofwhich the following is a specification, reference being had to theaccompany- 10 ing drawing, forming a part thereof.

This invention relates more particularly to mechanism for taking up andpaying out an electric cable or conductor in connection with hoistinapparatus.

Its main jects are to take up and pay out the electric cabe or conductorwhich supplies current to a lifting magnet or portable electric motorconnected with the hoisting apparatus without undue strain on the cableor conductor; to prevent breaking or injuring the cable or conductor incase it encounters obstructions. in the movement of the lifting magnetor portable motor from place to place; and generally to improve theconstruction and operation of mechanism of this class.

It consists in the construction, arrangement and combination of parts asherein after particularly described and pointed out in the claims.

Figure 1 is a side elevation of winding mechanism embodying theinvention as app'ied to typical hoisting apparatus comprising a hoistingdrum and a lifting magnet; Fig. 2 is an end elevation as viewed from theright relative to Fig. 1; Fig. 3 is an enlarged longitudinal section onthe line 3-3, Figs. 2 and 4 of the cable winding mechanism; and Fig. 4is an enlarged cross section on the line 44, Fig. 3.

Referring to Figs. 1 and 2, 1 designates a lifting magnet of theusual orany suitable construction, suspended by chains 2 from the hook 3 of asheave block 4, which in the present instance is provided with twosheaves 5. The sheave block 4 with the hook 3 is suspended by two doublelines of cable 7. passing around the sheaves 5 and fastened at one endto a relatively fixed member or members of hoisting apparatus such asthe trolley frame 8 of a crane. At the other end the two lines or runsof the I cable- 7 are fastened to a ho s g drum mounted in the frame 8and driven in the usual manner by a motor (not shown) through a shaft11, which is mounted in the frame 8 parallel with the axis of the drum10, and is connected therewith by a pinion 12 and gear -.13. Thehoisting apparatus as thus far'described, is like or similar to that incommon use, and no claim is made thereto per se.

Referring to Figs. 3 and 4 in connection with Figs. 1 and 2, the cablewinding mech anism embodying the present invention comprises a windingdrum 15, fixed on a shaft '16, which is supported by bearings 17 and 18on the frame 8, arallel with the shaft 11 and the axis of t e hoistingdrum 10. An insulated electric cable 20 for supp'ying current to thelifting magnet 1, is fastened at one end, as by a clamp 21, to the drum15,as shown in Fig. 3, and at the other end to the magnet, as shown inFigs. 1 and 2.

The drum 15 is preferably provided at the ends with outwardly projectingflanges 26, to prevent the cable from accidentally running oif the drum,particularly when an obstruction is encountered by the cable, and ispreferably formed with a spiral groove to prevent chafing between theturns of the cable and injury to the insulation as the cable is woundand unwound.

The drum is formed at one end with a recess in which the connectionbetween the cable and current supply conductors 22 is madeand enclosed,the recess in the drum being closed and the electric connections betweenthe cable 20 and conductors 22 being protected by a removable coverplate 23. The conductors 22 are connected at their outer ends withcollector rin s 24, which are mounted on and insulated rom a sleeve orhead 25, fixed on the adjacent end of the shaft 16, the separateconductors being brought together and formed into an insulated cable,which passes through a bore in the adjacent end of the shaft and alateral opening therein to the clamp 21 within the drum 15.

Insulated brushes 27, bearing on the rings axial ali ment wit ing 17,and is provided with a removable cover 30.

The sleeve or head 25 and a collar 32, fastened on the shaft 16 at theopposite end of the bearing 17, receive the end thrust on the shaft andprevent axial displacement thereof.

On the reduced end of the shaft 16 ad acent the bearing 18, a flangedratchet and friction'wheel 34 is loosely mounted between a friction face35 on the drum 15 and a rotary friction driver 36, the faces of theratchet and friction wheel next to the drum and driver being providedwith disks 37 of suitable wearin and friction material such asvulcanized fi er or the like. The flanges 38, which shroud the teeth ofthe ratchet wheel, are for convenience of construction, made separateand bolted or riveted with the friction disks 37 .to the ratchet wheel.

The hub of the friction driver 36, which is fitted to turn freel in thebearing 18 in h the drum 15 and ratchet w eel 34, is formed in its outerend with a counterbore, and a spring 39 interposed between a washer 40splined on the shaft 16 and adjusting and lock nuts 41 and 42 threadedon the outer end of the shaft, holds the drum 15, ratchet wheel 34 anddriver 36 in yielding frictional engagement with one another, the collar40 bearing against the inner end of the counterbore in the hub of thedriver or against the outer end of a flanged bushing 43 fitted in thehub.

A pawl 45 is pivotally mounted on a pin 46 fastened to the adjacentbearing 18, and is formed with a transverse bore in which are looselyinserted friction drags or shoes 47, with an interposed spring 48,tending to press them outwardly and holding them in yielding frictionalengagement with the inner faces of the flanges 38.

When the driver 36 is turned clockwise, as indicated b an arrow on Fig.4, in the direction to wind the cable 20 on the drum 15, the pawl 45 isthrown by the frictional action of the flanges 38 on the drags or shoes47, out of position to engage with the teeth of the ratchet wheel 34, asshown in Fig. 4, the outward movement of the pawl being limited by astop pin 49 fastened in the earin 18.

Under these conditions, the drum 15 is turned in the direction forWinding the cable 20 thereon by the frictional engagement of the driver,ratchet wheel and friction face of the drum, with a force determined bythe adjustment of the spring 39.

When the driver is turned in the reverse d direction, orcounterclockwise, the pawl 45 is thrown by the action of the flanges 38on the dra s or shoes 47, inwardly into engagement with the teeth of theratchet wheel 34, thereby arresting the movement of the ratchet wheel,the driver turning in frictional engagement therewith.

Under these conditions the drum 15 will .be turned in the same directionin frictional ing drum 10 so as to be rotated simultaneously therewithin opposite directions, by any suitable gearing. As shown by thedrawing, the shaft 11 which is connected, as hereinbefore described,with the hoisting drum 10 by a pinion 12 and gear 13, is provided with apinion 51 meshing with a gear 52 fixed on the hub of the driver 36. .Thegearing is preferably so proportioned that the friction driver 36 willbe rotated at a slightly greater speed than would be required to take upthe cable 20 at-the same rate of speed that the magnet 1 is lifted bythe hook 3 and cables 7. This insures taking up any slack in the cable26 and subjecting the cable to a predetermined tension in hoisting themagnet 1, according to the adjustment of the spring 39 which determinesthe force of frictional engagement between the driver 36, ratchet wheel34 and drum 15, there being a slight slippage in hoisting between theengaging friction faces of the ratchet wheel and drum or driver.

When the magnet is lowered and the drum 15 is turned in a reversedirection b the pull of the magnet on the cable 20, the friction face 35on the drum slips on the adjacent friction disk 37 of the ratchet wheel,thereby subjecting the cable to substantially the same tension as inhoisting, determined also by the adjustment of the spring 39, and

, preventing injurious strain on the cable.

In case the cable 20 is caught on an obstruction in transferring themagnet 1 with or without a load, from place to place, it will be unwoundfrom the drum 15 without injury, the drum bein permitted to turnwhenever the pull on tie cable is sufiicient to overcome the frictionalengagement between the drum and ratchet wheel or between the ratchetwheel and driver.

' In place of a single electric cable containing two wires or electricconductors for supplying current to the lifting magnet, two separatecables each containing a single wire or conductor, may be used andseparately connected with the magnet and with a single or twosynchronously rotated winding IIllIlS.

The operation of the electric-cable winding mechanism in connection withhoisting apparatus will be apparent from the drawing and foregoingdescription of the construction and arrangement of parts of such Illrat/agar mechanism and apparatus, and need not be more specificallyexplained.

Various changes in the details of con struction and arrangement of partsof the mechanism and apparatus may be made, without departure from theprinciple and scope of the invention as defined in the following claims.

We claim:

1. In electric cable winding mechanism the combination with hoistingapparatus comprising a hoisting drum, of a winding drum, a frictiondriver connected and rotatable in opposite directions simultaneouslywith the hoisting drum, a ratchet wheel located between the winding drumand driver in frictional engagement therewith, and a pawl mounted on arelatively fixed part of the machine and adapted to be automaticallythrown into and out of engagement with the ratchet wheel when themovement of the driver is reversed.

2. In electric-cable winding mechanism the combination with hoistingapparatus 1 comprising a hoisting drum, of an electric cable windingdrum, an axially movable friction driver mounted in axial alignment withthe winding drum and having an actuating connection with the hoistingapparatus adapted to turn it in opposite direc tions simultaneously withthe hoisting drum, a ratchet wheel located between the driverand-winding drum in frictional engagement therewith, a, spring holdingthe driver, ratchet wheel and winding drum in yielding engagement withone another, and a pawl mounted on a relatively fixed part of themachine and movable by frictional contact with the ratchet wheel intoand out of positive engagement therewith.

8. In electric-cable winding mechanism the combination with hoistingapparatus comprising a hoisting drum, of an electric cable winding drum,an independently r0- tatahle and axially movable friction driver mountedin axial alignment with the winding drum, and having an actuatingconnection with the hoisting apparatus adapted to turn it in oppositedirections simultaneously with the hoisting drum, .a ratchet wheelrotatably mounted between the driver and winding drum in axial alignmentand in frictional engagement therewith, an adjustable spring holding thedriver, ratchet wheel and winding drum in yielding frictional engagementwith one another, and a pawl mounted on a relatively fixed part andmovable by frictional contact with the ratchet wheel into and out ofpositive engagement therewith.

at. In electric-cable winding mechanism the combination with hoistingapparatus comprising a hoisting drum, of an electriccable winding drum,a rotary friction driver mounted in axial alignment with the windingdrum and having an actuating connection with the hoisting apparatusadapted to turn it in opposite directions simultaneously with thehoisting drum, a flanged ratchet wheel mounted between and in axialalignment with the driver and winding drum, a spring holding the driver,ratchet wheel and winding drum in frictional engagement with one anotherand a pawl pivoted on a relatively fixed part of the machine andprovided with a yielding friction shoe engaging the flange of theratchet wheel and adapted to throw the pawl into and out of engagementwith the teeth of the ratchet wheel when the movement of the driver isreversed.

5. In electric-cable winding mechanism the combination with hoistingapparatus comprising a hoisting drum, of a rotary shaft having an axialbore and provided with insulated collector rings adjacent one end, awinding drum fixed on said shaft, a rotary driver, a ratchet wheelmounted between and in axial alignment and fric tional engagement withthe driver and winding drum and having an actuating connection with thehoisting apparatus adapted to turn it in opposite directions simultaneously with the hoisting drum, a pawl mounted on a relatively fixedpart of the machine and movable by frictional contact with the ratchetwheel into and out of engagement with the ratchet wheel teeth when themovement of the driver is reversed, conductors passing through the borein the shaft and connecting the electric cable with the collector rings,and insulated brushes bearing on said rings and connected with currentsupply conductors.

In witness whereof we hereto affix ou signatures.

WILLIAM A. YOUNG. FRANK BRILL.

